From Recon to XSS in 5 Minutes

🎯 The Backstory

While browsing programs on platforms like HackerOne and Bugcrowd, I noticed something frustrating:

Most popular programs were heavily tested by experienced researchers. Finding something impactful there felt like searching for a needle in a haystack.

Instead of competing in overcrowded targets, I changed strategy.

🏎️Strategy Shift — Finding Less Crowded Programs

I used Google dorking techniques to identify:

  • Recently launched programs
  • Fresh scope
  • Low researcher activity
  • High asset coverage

That's when I found a newly released program: redacted.com.

Scope looked promising. Almost all products were in scope. That's always a green signal.

🕵️ Recon Phase

I began with:

  • Subdomain enumeration
  • Manual browsing of each subdomain
  • Checking authentication flows
  • Identifying third-party integrations

While reviewing the subdomains, one particular endpoint immediately caught my attention.

It was redirecting to a login page associated with Palo Alto Networks.

And that's when something clicked.

👁️ Why That Endpoint Looked Suspicious 👁️

Because I've spent time studying:

  • Previous CVEs
  • XSS case studies
  • Writeups from other researchers
  • Common misconfigurations in login portals

I already knew certain patterns in similar login implementations had historically been vulnerable to reflected XSS.

So instead of random fuzzing…

I directly tested with a known payload pattern.

None

💥 The Result:

Within 5 minutes.

BOOM.

Reflected XSS triggered successfully.

No heavy automation. No complex bypass. Just pattern recognition and applied knowledge.

🧠 Key Takeaway

This wasn't luck.

It was preparation.

Studying previous vulnerabilities trains your brain to recognize vulnerable patterns instantly. That's what happened here.

📌 Important Notes for Fellow Hackers

1️⃣ Stop Fighting in Crowded Programs

Popular programs are saturated. Instead:

  • Hunt on newly launched programs
  • Look for fresh scope expansions
  • Monitor announcements

Less noise = higher signal.

2️⃣ Study Old CVEs Like They're Gold

Most vulnerabilities are not "new". They're repetitions of:

  • Old misconfigurations
  • Poor input validation
  • Reused insecure implementations

Pattern recognition > brute forcing.

💪 Recon is Everything

Before testing payloads:

  • Enumerate deeply
  • Understand the tech stack
  • Identify third-party services
  • Look for redirect parameters

Often the vulnerability is sitting in plain sight.

🪧 Learn to Notice "Odd" Endpoints

If something:

  • Looks out of place
  • Redirects externally
  • Includes parameters like redirect=, return=, next=

Test it carefully.

🔐 Responsible Disclosure

The target and payload details are currently redacted.

I will disclose:

  • The affected endpoint
  • The payload used
  • The exact reproduction steps

Once the issue is fixed and approved for public disclosure.

Until then —

Happy Hunting 🐞🔥